Revolutionary to its core. The Nike 20XI golf balls are the first balls on Tour to use a radical new core technology. The revolutionary RZN core delivers more distance off the tee and better control around the greens. It features faster initial velocity for maximum distance, the highest levels of MOI for longer, more controlled shots and new construction materials giving greater consistency ball-to-ball for highly predictable performance. Put the Nike 20XI-X used golf balls in your bag today and you will not be disappointed.